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One possibility is, on multi-light tail light assemblies, is a burned out bulb. Some cars have separate light bulbs for tail, brake, turn, and backup lights

The other possibility is an electrical short in the wiring. Somewhere in the miles of wires, two wires have crossed or the insulation has worn off and is shorting to the chassis. The only cure is to trace out each individual wire with a voltage meter.

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โˆ™ 2007-10-06 16:45:54
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Q: Why does one brake light work and the other brake light does not work?
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Why do only one brake light work?

Is/Are the other bulb(s) burnt out?


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tail light bulbs has two filaments inside. One for regular lights and a second for brake lights. One filament is burnt out. Change the bulb.


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